Crushed waste rock deposited on the ground during mining and ore processing, including some of the rock in which the ore is found. Unless they are handled carefully, they frequently release contaminants.

Threatened Species

Species of flora or fauna likely to become endangered within the foreseeable future.


Harmful to living organisms.

Transnational corporation

A corporation that is not based in any one country but may maintain corporate offices in several countries.


Layer of the atmosphere that contains about 95 per cent of the Earth's air and extends about six to 17 km up from the Earth, depending upon latitude and season.

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